MAGNETIC OBSERVATIONS, 
107 
OBSERVATIONS—Continued. 
Station, Camp 74. Date , November 30, 1853. 
OBSERVATIONS ON POLARIS. 
Face of circle. 
Whether observations are 
direct or by reflection. 
Time of observa¬ 
tion by chron¬ 
ometer No. 10. 
Reading of 
azimuth cir¬ 
cle. 
Computed azi¬ 
muth of Po¬ 
laris. 
Reading of azimuth 
circle when plane 
of instrument is in 
the true meridian. 
( 
West..— -{ 
l 
f 
East.-{ 
1 
l 
Direct _ 
h. m. s. 
2 07 40.5 
2 OS 30.2 
O ' 
73 05 
73 05 
' " 
47 24 
O ' " 
73 52 24 
Direct._ 
Reflection___ 
Reflection_-_ 
Direct__ 
2 03 44.3 
2 05 19. 9 
73 30 
73 31 
48 24 
74 18 54 
Direct_ 
Reading of azimuth circle when plane of instrument is in the true meridian, by mean of four observations 
74 05 39 
Error of chronometer -j- 2 h. 44 m. 37. 9s. 
Station, Camp 75. Date, December 1, 1853. 
OBSERVATIONS ON POLARIS. 
Face of circle. 
Whether observations are 
direct or by reflection. 
Time of observa¬ 
tion by chron¬ 
ometer No. 10. 
Reading of 
azimuth cir¬ 
cle. 
Computed azi¬ 
muth of Po¬ 
laris. 
Reading of azimuth 
circle when plane 
of instrument is in 
the true meridian. 
f 
West.... -{ 
r 
East....| 
Direct_ 
h. m. s. 
2 38 14.5 
2 39 06.2 
C ' 
51 46 
51 47 
34 24 
O ' " 
52 20 54 
Direct.... 
Reflection_ 
Reflection_ 
Reflection .. 
Reflection__ 
Direct_ 
2 33 16. 1 
2 34 20. 2 
52 07 
52 08 
36 38 
52 44 08 
Direct... 
Reading of azimuth circle when plane of instruments is in the true meridian, by mean of four observations 
52 32 31 
Error of chronometer + 2h. 45 m. 31.9s. 
